CN101484670A - Exhaust gas purifier for internal combustion engine - Google Patents
Exhaust gas purifier for internal combustion engine Download PDFInfo
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- CN101484670A CN101484670A CNA2007800250024A CN200780025002A CN101484670A CN 101484670 A CN101484670 A CN 101484670A CN A2007800250024 A CNA2007800250024 A CN A2007800250024A CN 200780025002 A CN200780025002 A CN 200780025002A CN 101484670 A CN101484670 A CN 101484670A
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- Prior art keywords
- sox
- trapping
- supply
- waste gas
- temperature
- Prior art date
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 264
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 38
- 239000000446 fuel Substances 0.000 claims description 236
- 239000002912 waste gas Substances 0.000 claims description 206
- 239000006096 absorbing agent Substances 0.000 claims description 59
- 239000007789 gas Substances 0.000 claims description 57
- 230000005764 inhibitory process Effects 0.000 claims description 53
- 239000013618 particulate matter Substances 0.000 claims description 30
- 239000003054 catalyst Substances 0.000 claims description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 230000001174 ascending effect Effects 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 230000001143 conditioned effect Effects 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000002000 scavenging effect Effects 0.000 abstract 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 837
- 239000005022 packaging material Substances 0.000 description 184
- 238000007599 discharging Methods 0.000 description 66
- 238000002347 injection Methods 0.000 description 50
- 239000007924 injection Substances 0.000 description 50
- 239000007921 spray Substances 0.000 description 25
- 230000033228 biological regulation Effects 0.000 description 14
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 229910052697 platinum Inorganic materials 0.000 description 6
- 229910021653 sulphate ion Inorganic materials 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 230000004913 activation Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 210000003850 cellular structure Anatomy 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229910000510 noble metal Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9495—Controlling the catalytic process
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/085—Sulfur or sulfur oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0285—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a SOx trap or adsorbent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/405—Multiple injections with post injections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/208—Hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1612—SOx amount trapped in catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Materials Engineering (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
This invention provides an exhaust gas purifier for an internal combustion engine which executes HC supply control in which, when predetermined conditions are established, HC is supplied into an exhaust gas on the upstream side of an SOx scavenging material (11). When the amount of the scavenged SOx is smaller than a predetermined amount, a first HC supply control is carried out as the HC supply control in which HC is supplied into the exhaust gas in a predetermined pattern on the upstream of the SOx scavenging material. When the amount of the scavenged SOx is larger than a predetermined amount, a second HC supply control is carried out as the HC supply control. In the second HC supply control, HC is supplied into an exhaust gas on the upstream of the SOx scavenging material in such a pattern that is different from a predetermined pattern and can suppress a local rise in the temperature of the SOx scavenging material to a value above a predetermined temperature or can suppress the local formation of a rich area in terms of fuel-air ratio in the exhaust gas which flows into the SOx scavenging material.
Description
Technical field
The present invention relates to a kind of Exhaust gas purifying device of internal-combustion engine.
Background technique
In Japanese kokai publication hei 6-173652 communique, put down in writing a kind of exhaust gas purifier for internal combustion engine that absorbs the NOx absorbing agent of NOx (nitrogen oxide) in the waste gas that in the exhaust passage, is provided with.At this, also contain SOx in the waste gas, open the NOx absorbing agent of putting down in writing in the flat 6-173652 communique the spy, absorption of N Ox but also absorb SOx not only, according to the uptake of SOx, the amount of the NOx that the NOx absorbing agent can absorb correspondingly reduces.Therefore, open in the Exhaust gas purifying device that flat 6-173652 communique put down in writing the spy, the SOx absorbing agent that will be used for absorbing waste gas SOx is arranged on the upstream of NOx absorbing agent, absorbs SOx in waste gas by this SOx absorbing agent, thereby avoids SOx to flow in the NOx absorbing agent.
Summary of the invention
But, SOx absorbing agent generally speaking, when the air fuel ratio that flows into waste gas wherein is the air fuel ratio rarer than chemically correct fuel, and the temperature of this SOx absorbing agent just absorbs the SOx in the waste gas when higher than so-called activation temperature.On the other hand, when the air fuel ratio that flows into waste gas wherein is chemically correct fuel or the air fuel ratio denseer than this chemically correct fuel, and when the temperature of this SOx absorbing agent was higher or higher than certain temperature (to call " SOx release temperature " in the following text) than activation temperature, the SOx absorbing agent just discharged the SOx that is absorbed.At this moment, because the SOx that absorbs in the waste gas is the original function of SOx absorbing agent, therefore should not when should absorbing SOx, the SOx absorbing agent but discharge SOx by the SOx absorbing agent.And this situation is not only applicable to that SOx is the Exhaust gas purifying device that possesses the SOx absorbing agent of purpose in the waste gas to absorb, and to be widely used in SOx in the capture in flue gas be the Exhaust gas purifying device that possesses the SOx material for trapping of purpose.
The objective of the invention is to the phenomenon that in the internal-combustion engine that possesses the SOx material for trapping that is used for capture in flue gas SOx, can prevent reliably in the time should making the SOx material for trapping capture SOx, the SOx material for trapping but discharges SOx.
In order to solve above-mentioned problem, as the 1st mode of execution of the present invention, a kind of Exhaust gas purifying device of internal-combustion engine, the SOx material for trapping that will be used for capture in flue gas SOx is arranged on also can carry out HC supply control in the exhaust passage, promptly when the air fuel ratio of the waste gas that flows into this SOx material for trapping be temperature than the rarer air fuel ratio of chemically correct fuel and this SOx material for trapping when being lower than preset temperature, this SOx material for trapping is with regard to the SOx in the capture in flue gas; When the air fuel ratio of the waste gas that flows into this SOx material for trapping is chemically correct fuel or the air fuel ratio denseer than this chemically correct fuel, and when the temperature of this SOx material for trapping is higher than described preset temperature, this SOx material for trapping just discharges the SOx that captures, when pre-conditioned establishment, HC is supplied in upstream at the SOx material for trapping in waste gas, wherein, when the amount of the SOx that captures when the SOx material for trapping is less than predetermined amount, carry out HC supply control as described HC supply control, promptly in waste gas, supply HC in SOx material for trapping upstream with preset mode; When the SOx of SOx material for trapping capture measures more than described predetermined amount, carry out the 2nd HC supply control as described HC supply control, promptly be higher than described preset temperature or be suppressed at the pattern that forms local dense air fuel ratio zone in the waste gas that flows into the SOx material for trapping, in waste gas, supply HC in the upstream of SOx material for trapping with SOx material for trapping temperature different with described preset mode and that inhibition is local.
As the 2nd mode of execution of the present invention, in the described HC supply control, at the HC of the upstream of SOx material for trapping supplying unit time predetermined amount in waste gas; In described the 2nd HC supply control, in waste gas, supply the HC that is less than described unit time predetermined amount in the upstream of SOx material for trapping.
As the 3rd mode of execution of the present invention, in above-mentioned the 2nd HC supply control, the HC that supplies in waste gas in the upstream of SOx material for trapping in the upstream of SOx material for trapping is supplied than described HC supply control in waste gas has the diffusible HC in the higher waste gas.
In the 4th mode of execution of the present invention, in above-mentioned the 2nd HC supply control, be maintained greater than default rarefied content with the rarefied content of the waste gas air fuel ratio that flows into the SOx material for trapping, in waste gas, supply HC in the upstream of SOx material for trapping.
In the 5th mode of execution of the present invention, above-mentioned default rarefied content is set to, and low more this rarefied content of the temperature of SOx material for trapping is just big more.
As the 6th mode of execution of the present invention, in described the 2nd HC supply control, when in waste gas, supplying HC in the upstream of SOx material for trapping, the local temperature ascending amount of the SOx material for trapping of unit time is maintained, the local temperature ascending amount of the SOx material for trapping of the unit time of being allowed in controlling less than above-mentioned HC supply.
As the 7th mode of execution of the present invention, in described the 2nd HC supply control, when in waste gas, supplying HC in the upstream of SOx material for trapping, all temperature ascending amounts of the SOx material for trapping of unit time are maintained, all temperature ascending amounts of the SOx material for trapping of the unit time of being allowed in controlling less than described HC supply.
In the 8th mode of execution of the present invention, in the exhaust passage in above-mentioned SOx material for trapping downstream, be provided with the particulate filter of the particulate matter in the capture in flue gas, above-mentionedly one of pre-conditioned be, be judged as the temperature that needs this particulate filter and rise to preset target temperature is removed the particulate matter that this particulate filter was captured with burning fuel removal condition, when this burning removal condition is set up and when carrying out above-mentioned the 2nd HC supply control, the 2nd HC supply control will set up and carry out an above-mentioned HC and supply when controlling with described burning removal condition, above-mentioned target temperature in the one HC supply control is compared lower temperature as target temperature, supplies HC in the upstream of SOx material for trapping in waste gas.
As the 9th mode of execution of the present invention, in above-mentioned the 2nd HC supply control, when supplying HC in the upstream of SOx material for trapping in waste gas, the temperature amplitude of SOx material for trapping is maintained the temperature amplitude less than the SOx material for trapping of being allowed in the above-mentioned HC supply control.
As the 10th mode of execution of the present invention, in the exhaust passage in above-mentioned SOx material for trapping downstream, be provided with the NOx absorbing agent that absorbs NOx in the waste gas, above-mentionedly one of pre-conditioned be, be judged as the NOx release conditions that need discharge NOx from the NOx absorbing agent, when this NOx release conditions is set up and when carrying out above-mentioned the 2nd HC supply control, in the 2nd HC supply control, HC is supplied in upstream at the SOx material for trapping in waste gas, thereby the temperature amplitude of SOx material for trapping is maintained, sets up and the temperature amplitude of the SOx material for trapping of being allowed in the one HC supply control when carrying out described HC supply control less than above-mentioned NOx release conditions.
In the 11st mode of execution of the present invention, in the exhaust passage of above-mentioned SOx material for trapping upstream, the oxidability that is provided with than this SOx material for trapping has the more oxidation catalyst of high oxidative capacity.
From the record of the following drawings and preferred implementation of the present invention, can understand the present invention more fully.
Description of drawings
Fig. 1 is the schematic representation that possesses the compression ignition internal combustion engine of Exhaust gas purifying device of the present invention.
Fig. 2 (A) and (B) for the expression particulate filter structural drawing.
Fig. 3 is the sectional view of the catalyst carrier surface portion of NOx catalyzer.
Fig. 4 is the sectional view of the catalyst carrier surface portion of SOx material for trapping.
Fig. 5 (A)～(C) discharges the figure that control describes for being used for to the NOx of the Exhaust gas purifying device of the 1st mode of execution.
Fig. 6 (A)～(C) discharges the figure that control describes for being used for to the NOx of the Exhaust gas purifying device of the 2nd mode of execution.
Fig. 7 discharges the schematic representation of one of control flow example for the NOx that carries out embodiment of the present invention.
Fig. 8 (A)～(C) removes the figure that control describes for being used for to the PM of the Exhaust gas purifying device of the 7th mode of execution.
Fig. 9 (A)～(C) removes the figure that control describes for being used for to the PM of the Exhaust gas purifying device of the 8th mode of execution.
Figure 10 removes the schematic representation of one of control flow example for the PM that carries out embodiment of the present invention.
Figure 11 discharges the schematic representation of one of control flow example for the NOx of the Exhaust gas purifying device of implementation the 15th mode of execution.
Figure 12 removes the schematic representation of one of control flow example for the PM of the Exhaust gas purifying device of implementation the 16th mode of execution.
Figure 13 is an embodiment's of an applicable compression ignition internal combustion engine of the present invention schematic representation.
Figure 14 is another embodiment's of an applicable compression ignition internal combustion engine of the present invention schematic representation.
Figure 15 is another embodiment's of an applicable compression ignition internal combustion engine of the present invention schematic representation.
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.Fig. 1 represents to have possessed the compression ignition internal combustion engine of Exhaust gas purifying device of the present invention.Fig. 1 represents that respectively 1 is body of the internal-combustion engine, and 2 is the firing chamber of each cylinder, and 3 for to be used for the automatically controlled Fuelinjection nozzle of burner oil in each firing chamber 2 respectively, and 4 is intake manifold, and 5 is gas exhaust manifold.Intake manifold 4 links to each other with the outlet of the compressor 7a of exhaust turbine supercharger 7 by air inlet duct 6, and the inlet of compressor 7a links to each other with air-strainer 8.In air inlet duct 6, be provided with the closure 9 that drives by stepping motor, around air inlet duct 6, also be provided with the cooling unit 10 that is used to cool off the suction air that flow in the intake guide 6.In mode of execution shown in Figure 1, cooling water of internal combustion engine is introduced in the cooling unit 10, and sucks air by the cooling water of internal combustion engine cooling.In addition, gas exhaust manifold 5 links to each other with the inlet of the exhaust driven gas turbine 7b of exhaust turbine supercharger 7, exhaust driven gas turbine 7b outlet link to each other with the inlet of SOx material for trapping 11 by outlet pipe 13.In outlet pipe 13, the waste gas that is used in flowing into outlet pipe 13 is installed supplies for example HC supply valve 14 of HC (hydrocarbon).In addition, the outlet of SOx material for trapping 11 links to each other with NOx catalyzer 12.
Be connected with the load sensor 41 of the proportional output voltage of the amount of depressing of generation and accelerator pedal 40 on the accelerator pedal 40, the output voltage of load sensor 41 inputs to input interface 35 by pairing AD converter 37.In addition, on input interface 35, also be connected with for example 15 ° of CKP 42 that just produce the output pulse of the every rotation of bent axle.In addition, output interface 36 drives and links to each other with stepping motor, HC supply valve 14, EGR control valve 16 and petrolift 20 with Fuelinjection nozzle 3, closure 9 by pairing drive circuit 38.
Then, NOx catalyzer 12 is described.NOx catalyzer 12 is supported on the monolithic substrate or pelleted substrate of tridimensional network, perhaps is supported on the particulate filter (to call " filter " in the following text) of cellular structure.That is, NOx catalyzer 12 is carried on the various carriers, the situation that NOx catalyzer 12 is supported on the filter describes below.
Fig. 2 (A) and (B), the expression load structure of filter 12a of NOx catalyzer 12.Wherein, the plan view of Fig. 2 (A) expression filter 12a, the side cross-sectional, view of Fig. 2 (B) expression filter 12a.As Fig. 2 (A) and (B), filter 12a forms cellular structure, and has a plurality of exhaust passages 60,61 that are parallel to each other and extend.These exhaust passages are made of by the waste gas flow pass 61 that plunger 63 blocks by waste gas flow channel 60 and the upstream extremity that plunger 62 blocks downstream.And, in Fig. 2 (A), be decorated with oblique line and partly represent plunger 63.Therefore, waste gas flow channel 60 and waste gas flow pass 61 are arranged alternately by the partition wall 64 of thin-walled.In other words, waste gas flow channel 60 and waste gas flow pass 61 are configured to, and each waste gas flow channel 60 is surrounded by four waste gas flow pass 61, and each waste gas flow pass 61 is also surrounded by four waste gas flow channels 60.
In embodiments of the present invention, use platinum (Pt),, for example use from the alkali metal of potassium (K), sodium (Na), caesium (Cs) as the component that constitutes NOx absorbing agent 47 as noble metal catalyst 46; The alkali earths of barium (Ba), calcium (Ca); And at least a element of selecting in the terres rares of lanthanum (La), yttrium (Y).
Be called air fuel ratio if will be supplied in the air in the exhaust passage of air-intake of combustion engine passage, firing chamber 2 and NOx catalyzer 12 upstreams and the ratio of fuel (hydrocarbon), then NOx absorbing agent 47 can absorb and discharge the effect of NOx, promptly as the air fuel ratio of waste gas absorption of N Ox when being rarer, if then the NOx that is absorbed is discharged when the oxygen concentration in the waste gas descends than chemically correct fuel.
That is, if to use barium (Ba) as example the situation that constitutes NOx absorbing agent 47 components to be described, then as shown in Figure 3, when the air fuel ratio of waste gas was thin, when promptly the oxygen concentration in the waste gas was very high, the NO that is contained in the waste gas was oxidized to NO on platinum 46
2, be absorbed into then in the NOx absorbing agent 47 and with barium oxide (BaO) when combining, with nitrate anion (NO
3 -) form in NOx absorbing agent 47, spread.NOx is absorbed in the NOx absorbing agent 47 in this way.As long as the oxygen concentration height in the waste gas will form NO on the surface of platinum 46
2, saturated as long as the NOx absorptivity of NOx absorbing agent 47 does not have, NO
2Thereby will be absorbed into and generate nitrate anion (NO in the NOx absorbing agent 47
3 -).
Relative therewith, if thereby by by HC supply valve 14 supply HC the air fuel ratio of waste gas being become chemically correct fuel or when denseer than this chemically correct fuel, then because the oxygen concentration in the waste gas descends, reaction can be to opposite direction (NO
3 -→ NO
2) carry out, so the nitrate anion (NO in the NOx absorbing agent 47
3 -) will be with NO
2Form from NOx absorbing agent 47, be released.Subsequently, d/d NOx just is reduced by unburned HC and the CO that comprises in the waste gas.
When the air fuel ratio of waste gas was thin, promptly when the condition of rare air fuel ratio was burnt, the NOx in the waste gas was absorbed in the NOx absorbing agent 47.But if when proceeding to burn under the condition of rare air fuel ratio, then the NOx absorptivity of NOx absorbing agent 47 during this period can be saturated, so just can not pass through NOx absorbing agent 47 absorption of N Ox again.Therefore, embodiments of the present invention before the NOx of NOx absorbing agent 47 absorptivity is saturated, thereby by from HC supply valve 14 supply HC the air fuel ratio of waste gas temporarily being thickened, make NOx discharge from NOx absorbing agent 47 thus.
, contain SOx (oxysulfide) in the waste gas, i.e. SO
2If, this SO
2Flow in the NOx catalyzer 12, then this SO
2On platinum 46, be oxidized to SO
3Then, this SO
3Be absorbed in the NOx absorbing agent 47 and with barium oxide (BaO) when combining, with sulfate radical (SO
4 2-) form in NOx absorbing agent 47, spread, thereby generate stable sulphate (BaSO
4).But, because NOx absorbing agent 47 has strong basicity, so this sulphate (BaSO
4) stable and be difficult to decompose, only with the air-fuel ratio of waste gas, sulphate (BaSO
4) also can not be decomposed and intactly residual.Therefore, in NOx absorbing agent 47, sulphate (BaSO As time goes on
4) can increase, so As time goes on 47 absorbent NOx amounts of NOx absorbing agent will descend.
, as described in starting, in this case, if rise in the temperature that makes NOx catalyzer 11 under the state of the SOx release temperature more than 600 ℃, the waste gas air fuel ratio that flows into NOx catalyzer 11 is become dense, then SOx is released from NOx absorbing agent 47.But, in this case, from NOx absorbing agent 47, just discharge SOx bit by bit.Therefore, discharge all SOx in order to make NOx absorbing agent 47, must be for a long time the air fuel ratio of waste gas is in dense, so a large amount of fuel of needs or the problem of reducing agent are just arranged.And the SOx that discharges from SOx absorbing agent 47 can be discharged into the atmosphere, and this neither be desirable.
Therefore, embodiments of the present invention are provided with SOx material for trapping 11 in the upstream of NOx catalyzer 12, come the SOx that contains in the capture in flue gas by this SOx material for trapping 11, and SOx is not flow in the NOx catalyzer 12.Then, this SOx material for trapping 11 is described.
SOx material for trapping 11, for example the integral catalyzer by cellular structure constitutes, and has along the linearly extended a plurality of exhaust flow through holes of the axial direction of SOx material for trapping 11.Form at the integral catalyzer by cellular structure under the situation of SOx material for trapping 11, on the inner circle wall face of each exhaust flow through hole, load has for example catalyst carrier of aluminium oxide formation, and Fig. 4 has figured the cross section of the surface portion of this catalyst carrier 50.As shown in Figure 4, be formed with coating 51 on the surface of catalyst carrier 50, spread loads has noble metal catalyst 52 on the surface of this coating 51.
In embodiments of the present invention, use platinum (Pt),, for example can use alkali metal from potassium (K), sodium (Na), caesium (Cs) as the component that constitutes coating 51 as noble metal catalyst 52; The alkali earths of barium (Ba), calcium (Ca); And at least a element of selecting in the terres rares of lanthanum (La), yttrium (Y).The coating 51 that is SOx material for trapping 11 is strong basicity.
So as shown in Figure 4, the SOx that is contained in the waste gas mainly is SO
2, oxidized on platinum 52, then become trapped in the coating 51.Be SO
2With sulfate radical (SO
4 2-) form in coating 51, spread, and form sulphate.And as mentioned above, coating 51 is strong basicity, therefore as shown in Figure 4, is comprised in a part of SO in the waste gas
2Directly trapped in the coating 51.
In addition, in waste gas, also comprise particulate matter.The particulate matter that comprises in the waste gas by load the filter 12a of NOx catalyzer 12 capture, and oxidized successively., if the amount of the particulate matter that is captured is during more than the amount of oxidized particulate matter, then particulate matter will be deposited on the filter 12a gradually, in this case, if the accumulating amount of particulate matter increases, will cause the decline of internal-combustion engine output power.Therefore, when the accumulating amount of particulate matter increases, just must remove the particulate matter of piling up.In this case, if rise to about 600 ℃, just can carry out oxidation removal to the particulate matter of piling up in the temperature that makes filter 12a on the basis of air excess.
Therefore, in embodiments of the present invention, when the amount of the particulate matter on being deposited in filter 12a surpasses tolerance, by on the thin basis of the air fuel ratio of waste gas, the temperature of filter 12a being risen, thereby the particulate matter of piling up is carried out oxidation removal.Specifically, in embodiments of the present invention, when the front and back differential pressure by the detected filter 12a of differential pressure transducer 23 surpasses admissible value, the shot-like particle quality that just is judged as accumulation has surpassed tolerance, control heats up this moment, the waste gas air fuel ratio that flow into filter 12a is maintained thin the time temperature of rising filter 12a.
, when the air fuel ratio of the waste gas that flows into the SOx material for trapping is a temperature than the rarer air fuel ratio of chemically correct fuel and this SOx material for trapping 11 when being higher than uniform temperature (to call " activation temperature " in the following text), just carry out the SOx capture effect of above-mentioned SOx material for trapping 11.On the other hand, if flow into the air fuel ratio of the waste gas of SOx material for trapping and be chemically correct fuel or than this chemically correct fuel when denseer and its temperature is higher than above-mentioned activation temperature or is higher than uniform temperature (below be referred to as " SOx release temperature "), 11 of SOx material for trapping can be with the SOx release that captures.Therefore, for fear of discharge SOx from SOx material for trapping 11, the waste gas air fuel ratio that will avoid at least flowing into SOx material for trapping 11 becomes chemically correct fuel or denseer than it, needs to make the temperature of SOx material for trapping 11 not to be higher than the SOx release temperature simultaneously.
, even the temperature of SOx material for trapping 11 is lower than the SOx release temperature as a whole, also have the local phenomenon higher than SOx release temperature.At this moment, if (below be referred to as " SOx amount of collected ") becomes many amount of the SOx that is captured by SOx material for trapping 11, and when the waste gas that is equal to or richer than the air fuel ratio of chemically correct fuel flow into SOx material for trapping 11, then might be from local temperature than discharging SOx the higher part SOx material for trapping 11 of SOx release temperature.In addition, even it is thin as a whole to flow into the waste gas air fuel ratio of SOx material for trapping 11, the also phenomenon that can exist the part to thicken.At this moment, if the SOx amount of collected of SOx material for trapping 11 becomes often, and the temperature of SOx material for trapping 11 then might discharge SOx when being higher than the SOx release temperature from the SOx material for trapping 11 of a part.Promptly, in order to prevent from SOx material for trapping 11, to discharge SOx reliably, when the SOx of SOx material for trapping 11 amount of collected becomes many, and the waste gas air fuel ratio that flow into SOx material for trapping 11 equals or is estimated as to equal chemically correct fuel or when denseer than it, even just need avoid the local temperature of temperature of SOx material for trapping 11 to be higher than the SOx release temperature.Equally, in order to prevent from SOx material for trapping 11, to discharge SOx reliably, when the SOx of SOx material for trapping 11 amount of collected becomes many, and the temperature of SOx material for trapping 11 is higher than or is estimated to be when being higher than the SOx release temperature, even just need avoid making local also the equaling chemically correct fuel or compare richer of waste gas air fuel ratio that flow into SOx material for trapping 11.
Herein, can when from NOx absorbing agent 47, discharging NOx, be equal to or richer than chemically correct fuel as mentioned above, in waste gas, supply HC by HC supply valve 14 in order to make the waste gas air fuel ratio that flow into NOx catalyzer 12.Therefore, the waste gas air fuel ratio that flow into SOx material for trapping 11 this moment also becomes and is equal to or richer than chemically correct fuel.Therefore,, then from SOx material for trapping 11, discharge SOx, even and need avoid making the local temperature of temperature of SOx material for trapping 11 also to be higher than the SOx release temperature in order to prevent reliably if the SOx amount of collected of SOx material for trapping 11 is many at this moment.
Therefore, in embodiments of the present invention, discharge control as the NOx that from NOx absorbing agent 47, discharges NOx, when being less than default amount (below be referred to as " established amount ") in the SOx of SOx material for trapping 11 amount of collected, only carry out from NOx absorbing agent 47 NOx that discharges NOx and discharge control (below be referred to as " NOx discharges control usually "), and when the SOx of SOx material for trapping 11 amount of collected during more than the afore mentioned rules amount, then carry out when suppressing to discharge SOx from SOx trapping agent 11, the SOx release that discharges NOx from NOx absorbing agent 47 suppresses NOx and discharges control.
Then, the NOx as the Exhaust gas purifying device of the 1st mode of execution is discharged control, and adopted common NOx discharges control and SOx and discharges and suppress NOx and discharge control and describe.And, in the following description, to to waste gas, supply HC from HC supply valve 14 and be called " HC supply ", the HC amount of the time per unit supplied to waste gas from HC supply valve 14 in each HC supply is called " HC fill rat ", to be called " HC supply time " from HC supply valve 14 is supplied HC to waste gas time in once the HC supply, the time lag of each HC supply that will carry out is called " HC supply at interval ", and discharges control or SOx at once common NOx and discharge and suppress NOx and discharge and carry out the number of times that HC supplies in the control and be called " HC supplies number of times ".
When judging when discharging NOx from NOx absorbing agent 47, and the SOx amount of collected of SOx material for trapping 11 is when being less than the afore mentioned rules amount, and the common NOx that carries out the 1st mode of execution discharges and controls.Shown in Fig. 5 (A), discharge in the control at this common NOx, with default HC supply at interval (below be referred to as " the HC supply at interval usually ") Ia, default HC supply number of times (below be referred to as " HC supply number of times usually ", in the example shown in Fig. 5 (A), be three times), carry out the HC fill rat and be the HC supply of default HC fill rat (below be referred to as " HC fill rat usually ") Qa and HC supply time for default HC supply time (below be referred to as " HC supply time usually) Ta.
And, discharge in the control at the common NOx of the 1st mode of execution, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set at, when whole HC supplies finishes to total HC amount of NOx catalyzer 12 supplies for, from NOx catalyzer 47, discharge enough HC amounts that the NOx of the amount of predesignating needs (below be referred to as " HC of regulation measures ").Therefore, if discharge control, just can make NOx absorbing agent 47 discharge the NOx of predetermined amount by the common NOx of the 1st mode of execution.
On the other hand, when judging when should clump NOx absorbing agent 47 discharging NOx, and the SOx amount of collected of SOx material for trapping 11 is during more than the afore mentioned rules amount, and the SOx that carries out the 1st mode of execution discharges and suppresses NOx and discharge control.Shown in Fig. 5 (B), discharging inhibition NOx at this SOx discharges in the control, to carry out the HC supply than the above-mentioned common HC supply interval Ib that Ia is shorter at interval with than the more number of times of above-mentioned common HC supply number of times, this HC supply be the HC fill rat than the littler HC fill rat Qb of above-mentioned common HC fill rat Qa, and the HC supply time equals the time T a of above-mentioned common HC supply time Ta.In this way, because the HC amount of supplying to waste gas from HC supply valve 14 in once HC supply is less, so be easy to waste gas, spread from the HC of HC supply valve 14 supplies.Therefore, owing to suppressed in waste gas to produce very dense zone, air fuel ratio part, so also suppressed the phenomenon that the temperature of local SOx material for trapping 11 is higher than the SOx release temperature.Therefore, can suppress reliably from SOx material for trapping 11, to discharge SOx.
Promptly, if have very dense zone, air fuel ratio part in waste gas, promptly have part in waste gas and comprise the zone of very many HC, then these HC are when waste gas flow into SOx material for trapping 11, on a part of zone of meeting attached to SOx material for trapping 11, if and the HC that these adhere to all burns in the part zone of SOx material for trapping 11, then the temperature of one part area just might be higher than the SOx release temperature., the SOx release inhibition NOx release control according to the 1st mode of execution owing to suppressed generation very dense zone, air fuel ratio part in waste gas, has also suppressed the phenomenon that a part of regional temperature of SOx material for trapping 11 is higher than the SOx release temperature.Therefore, the temperature that can suppress the SOx material for trapping 11 of part can be higher than the SOx release temperature, has also suppressed reliably to discharge SOx from SOx material for trapping 11.
And, shown in Fig. 5 (C), discharging inhibition NOx at the SOx of the 1st mode of execution discharges in the control, also can with than above-mentioned common HC supply at interval the longer interval Ic of Ia carry out the HC supply with the number of times identical with above-mentioned common HC supply number of times, this HC supply is the HC fill rat than the littler HC fill rat Qb of above-mentioned common HC fill rat Qa and HC supply time than the longer time T c of above-mentioned common HC supply time.Thus, because the HC fill rat in each HC supply is less, be easy to waste gas, spread from the HC of HC supply valve 14 supplies.Therefore, to be higher than the SOx release temperature owing to suppressed the temperature of local SOx material for trapping 11, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, suppress to be preferably in the NOx release control in the SOx of the 1st mode of execution release, when whole HC supplies finishes, to equal the HC amount of afore mentioned rules, set HC fill rat, the HC supply time in each HC supply and HC supply number of times in each HC supply to whole HC amounts of NOx catalyzer 12 supplies.Therefore, in the example shown in Fig. 5 (B), as the HC fill rat, the time T a identical with above-mentioned common HC supply time Ta be as the HC supply time with half the HC fill rat Qb of above-mentioned common HC fill rat Qa, and supply number of times with the number of times of the twice of above-mentioned common HC supply number of times as HC.And, in the example shown in Fig. 5 (B), with above-mentioned common HC supply at interval Ia half interval Ib as the HC supply at interval.
In addition, in the example shown in Fig. 5 (C), as the HC fill rat, as the HC supply time, the number of times identical with above-mentioned common HC supply number of times supplied number of times as HC with the twice time T c of above-mentioned common HC supply time Ta with half the HC fill rat Qb of above-mentioned common HC fill rat Qa.
Then, with reference to Fig. 6 the NOx release control of the Exhaust gas purifying device of the 2nd mode of execution is described.And in Fig. 6 (A)～(C), the line of upside represents from the HC supply of HC supply valve 14 to waste gas, and the line of downside is illustrated in that the fuel from Fuelinjection nozzle 3 sprays in the second half of expansion stroke of specific cylinder or the exhaust stroke.In addition, in the following description, be called " back fuel injection " with spraying from the fuel of Fuelinjection nozzle 2 in the second half of the expansion stroke in the specific cylinder or the exhaust stroke, the fuel quantity that is sprayed by Fuelinjection nozzle 2 in time per unit in each back fuel sprays is called " back fuel injection rate ", fuel injection time by Fuelinjection nozzle 2 in once back fuel sprays is called " back fuel injection time ", to carry out the time lag that each back fuel sprays is called " back fuel injection interval ", and the number of times that will carry out back fuel injection once is called " back fuel injecting times ".
Discharge in the control at the NOx of the 2nd mode of execution, should be when NOx absorbing agent 47 discharges NOx when judging (, when the NOx release conditions is set up), and when the SOx amount of collected of SOx material for trapping 11 is less than the afore mentioned rules amount (, when SOx release rejection condition is false), carry out common NOx and discharge control.Shown in the line of the upside of Fig. 6 (A), discharge in the control at this common NOx, with with above-mentioned common HC supply at interval Ia identical distance Ia and with the identical number of times of above-mentioned common number of times, carry out the HC supply, in this HC supply, the HC fill rat is that HC fill rat Qa and the HC supply time identical with above-mentioned common HC fill rat Qa is and the identical time T a of above-mentioned common HC supply time Ta.So at this moment, shown in the line of the downside of Fig. 6 (A), the neither one cylinder carries out back fuel and sprays.Certainly, discharge in the control at the NOx of the 2nd mode of execution, also, set HC fill rat, the HC supply time in each HC supply and HC supply number of times in each HC supply when whole HC supplies finishes, to equal the HC amount of afore mentioned rules to total HC amount of NOx catalyzer 12 supplies.
On the other hand, discharge in the control, when the NOx release conditions is set up, and the SOx amount of collected of SOx material for trapping 11 during when setting up (, SOx discharge rejection condition), carry out SOx and discharge and suppress NOx and discharge control greater than the afore mentioned rules amount at the NOx of the 2nd mode of execution.Shown in the line of the upside of Fig. 6 (B), discharging inhibition NOx at this SOx discharges in the control, with with above-mentioned common HC supply at interval Ia identical distance Ia and with the identical number of times of above-mentioned common number of times, carry out the HC supply, in this HC supply, the HC fill rat is than the littler HC fill rat Qb of above-mentioned common HC fill rat Qa, and the HC supply time is and the identical time T a of above-mentioned common supply time, simultaneously, can be shown in the line of the downside of Fig. 6 (B), to supply number of times identical number of times with above-mentioned common HC supply interval Ia identical distance Iap with above-mentioned common HC, carrying out back fuel sprays, during this back fuel sprayed, back fuel injection rate was than the littler back fuel injection rate Qbp of above-mentioned common HC fill rat Qa, and back fuel injection time is and the identical time T ap of above-mentioned common HC supply time Ta.Thus, because the HC amount of supplying to waste gas from HC supply valve 14 in once HC supply is less, so be easy to waste gas, spread from the HC of HC supply valve 14 supplies.Thereby by the HC that is sprayed by HC supply valve 14, the temperature that just can suppress the SOx material for trapping 11 of part will be higher than the SOx release temperature.And the fuel that is sprayed by Fuelinjection nozzle 3 in the second half of the expansion stroke of specific cylinder or exhaust stroke becomes lighting because the interior heat of cylinder is modified.By the fuel of lighting, be supplied in NOx catalyzer 12 by SOx material for trapping 11, this fuel by lighting is easy to spread in waste gas.Therefore, in the second half or exhaust stroke of the expansion stroke of specific cylinder, the temperature that can suppress local SOx material for trapping 11 by the fuel that is sprayed by Fuelinjection nozzle 3 will be higher than the phenomenon of SOx release temperature.Therefore, suppressed reliably from SOx material for trapping 11, to discharge SOx.
And, shown in Fig. 6 (C), suppress NOx in the SOx of the 2nd mode of execution release and discharge in the control, also can only pass through back fuel and spray to NOx catalyzer 12 supply HC (fuel).Promptly, shown in the line of the downside of Fig. 6 (C), also can be to supply number of times identical number of times with above-mentioned common HC supply interval Ia identical distance Iap with above-mentioned common HC, carrying out back fuel sprays, during this back fuel sprays, back fuel injection rate is and the identical back fuel injection rate Qap of above-mentioned common HC fill rat Qa, and the back fuel injection time is and the identical time T ap of above-mentioned common HC supply time Ta.Certainly, at this moment, shown in the line of the upside of Fig. 6 (C), do not carry out from the HC supply of HC supply valve 14 to waste gas.Thus, be by the fuel of lighting owing to pass through SOx material for trapping 11 to NOx catalyzer 12 supplied fuel (HC), so be easy in waste gas, spread.Therefore, the temperature that can suppress local SOx material for trapping 11 can be higher than the phenomenon of SOx release temperature.Thereby suppress reliably from SOx material for trapping 11, to discharge SOx.
And, suppress to be preferably in the NOx release control in the SOx of the 2nd mode of execution release, equal above-mentioned regulation HC (fuel) amount to spray total HC (fuel) amount that is supplied in NOx catalyzer 12 when finishing, set back fuel injection time and the back fuel injecting times of HC fill rat, the HC supply time in each HC supply and HC supply number of times in each HC supply and each back fuel back fuel injection rate, each back fuel in spraying in spraying at whole HC supply and whole back fuel.Therefore, in the example shown in Fig. 6 (B), with half the HC fill rat Qb of above-mentioned common HC fill rat Qa as the HC fill rat, the time T a identical with above-mentioned common HC supply time Ta is as the HC supply time, the number of times identical with above-mentioned common HC supply number of times supplied number of times as HC, with above-mentioned common HC fill rat Qa half back fuel injection rate Qap as the back fuel injection rate, the time T ap identical with above-mentioned common HC supply time Ta is as the back fuel injection time, and the number of times identical with above-mentioned common HC supply number of times is as back fuel injecting times.And, in the example shown in Fig. 6 (B), also will supply at interval and back fuel injection interval as HC with above-mentioned common HC supply interval Ia identical distance Ia, Iap.
In addition, in the example shown in Fig. 6 (C), back fuel injection rate Qap that will be identical with above-mentioned common HC fill rat Qa is as the back fuel injection rate, the time T ap identical with above-mentioned common HC supply time Ta is as the back fuel injection time, and the number of times identical with above-mentioned common HC supply number of times is as back fuel injecting times.And, in the example shown in Fig. 6 (C), will supply interval Ia identical distance Iap as back fuel injection interval with above-mentioned common HC.
And, in example shown in Figure 6, show that back fuel sprays and the HC supply is carried out in same timing, but owing to control back fuel injection timing according to the crank angle of internal-combustion engine, so strictly speaking, in most of the cases, back fuel injection timing is asynchronous with HC supply timing, has a little bias.In addition, in example shown in Figure 6, back fuel injection interval equates at interval with common HC supply, but based on same reason, strictly speaking in most of the cases, back fuel injection interval and common HC supply unequal at interval, and have a little bias.
And, when carrying out that back fuel sprays and during to NOx catalyzer 12 supply HC, the HC that when the second half of expansion stroke is carried out back fuel injection, supplies to NOx catalyzer 12, compare with the HC that carries out in the exhaust stroke supplying to NOx catalyzer 12 when back fuel sprays, the former diffusivity in waste gas is higher.Therefore, in the above-described embodiment, also can be, discharge control as NOx, the fuel injection is as the method to NOx catalyzer 12 supply HC, in NOx release is controlled usually after only adopting, thereby spray to NOx catalyzer 12 supply HC by in exhaust stroke, carrying out back fuel, on the other hand, discharge inhibition NOx at SOx and discharge in the control, spray to NOx catalyzer 12 supply HC thereby carry out back fuel in the second half of expansion stroke.In this way, can suppress from SOx material for trapping 11, to discharge the phenomenon of Sox reliably.
Then, the NOx of the Exhaust gas purifying device of the 3rd mode of execution being discharged control describes.Discharge in the control at the NOx of the 3rd mode of execution, set up and SOx when discharging rejection condition and being false, carry out discharging the identical control of control with the common NOx of above-mentioned the 1st mode of execution when the NOx release conditions.
On the other hand, discharge in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress NOx and discharge control when the NOx release conditions at the NOx of the 3rd mode of execution.Discharging inhibition NOx at this SOx discharges in the control, to discharge the identical common HC fill rat of control, common HC supply time and common HC supply at interval with the common NOx of above-mentioned the 1st mode of execution, and carry out each HC with common HC supply number of times and supply, prepare in advance by fractionation by the HC of lighting, with the part of the HC that supplies in waste gas by HC supply valve 14 in each HC supply as this by the HC of lighting.As mentioned above, be easy in waste gas, spread by the HC of lighting.Therefore, according to the SOx release inhibition NOx release control of the 3rd mode of execution, the temperature that can suppress the SOx material for trapping 11 of part is higher than the phenomenon of SOx release temperature.Therefore, can suppress reliably from SOx material for trapping 11, to discharge SOx.
Then, the NOx of the Exhaust gas purifying device of the 4th mode of execution being discharged control describes.Discharge in the control at the NOx of the 4th mode of execution, set up and SOx when discharging rejection condition and being false, carry out discharging the identical control of control with the common NOx of above-mentioned the 1st mode of execution when the NOx release conditions.
On the other hand, discharge in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress NOx and discharge control when the NOx release conditions at the NOx of the 4th mode of execution.Discharging inhibition NOx at this SOx discharges in the control, control HC fill rat, the HC supply time in each HC supply and HC supply interval in each HC supply, so that the temperature of NOx catalyzer 12 is maintained, be lower than with SOx material for trapping 11 in the temperature (hereinafter referred to as " maximum NOx catalyst temperature ") of the corresponding NOx catalyzer 12 of temperature of the HC of the waste gas SOx material for trapping 11 when once all burning.That is, if when the temperature of NOx catalyzer 12 is higher than above-mentioned maximum NOx catalyst temperature, the HC that the temperature of SOx material for trapping 11 can be higher than flowing into wherein carries out once all temperature of burning.In this case, when can once all burning during by SOx material for trapping 11, thereby make the temperature of local SOx material for trapping 11 be higher than the SOx release temperature, SOx is discharged from SOx material for trapping 11 from the HC of HC supply valve 14 supply.On the other hand, discharge according to the SOx of the 4th mode of execution and to suppress NOx and discharge control, be lower than above-mentioned maximum NOx catalyst temperature, once all burn so can suppress to flow into the HC of SOx material for trapping 11 because the temperature of NOx catalyzer 12 is maintained.Therefore, the temperature that can suppress local SOx material for trapping 11 can be higher than the phenomenon of SOx release temperature.Thereby can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, suppress to be preferably in the NOx release control in the SOx of the 4th mode of execution release, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set for, when whole HC supplies finished, the total HC amount that is fed to NOx catalyzer 12 equaled the HC amount of afore mentioned rules.
Then, the NOx of the Exhaust gas purifying device of the 5th mode of execution being discharged control describes.Discharge in the control at the NOx of the 5th mode of execution, set up and SOx when discharging rejection condition and being false, carry out discharging the identical control of control with the common NOx of the 1st mode of execution when the NOx release conditions.
On the other hand, discharge in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress NOx and discharge control when the NOx release conditions at the NOx of the 5th mode of execution.Discharging inhibition NOx at this SOx discharges in the control, HC supply time and HC supply in HC fill rat in each HC supply, each HC supply are controlled at interval, so that the amplitude of the temperature rise and fall of NOx catalyzer 12 (hereinafter referred to as " temperature amplitude ") is maintained less than the temperature amplitude that discharges the NOx catalyzer 12 of being allowed in the control at common NOx.That is, discharge inhibition NOx at SOx and discharge in the control,, also supply HC to NOx catalyzer 12 by spells owing to carry out the HC supply by spells.So, if HC is when NOx catalyzer 12 flows into, then the reaction heat by the HC on NOx catalyzer 12 make the temperature of NOx catalyzer 12 rise earlier after decline again.Here, the temperature amplitude of NOx catalyzer 12 is big, means that the amplitude of temperature rise and fall of SOx material for trapping 11 is also big.So in this case, Ju Bu SOx material for trapping 11 temperature may be higher than the SOx release temperature at least, if the SOx amount of collected of SOx material for trapping 11 during greater than the afore mentioned rules amount, then may discharge SOx from the SOx material for trapping.Therefore, discharging inhibition NOx at the SOx of the 5th mode of execution discharges in the control, HC supply time and HC supply in HC fill rat in each HC supply, each HC supply are controlled at interval, so that the temperature amplitude of NOx catalyzer 12 is maintained the temperature amplitude that discharges the NOx catalyzer 12 of being allowed in the control less than common NOx.In this way, the temperature that can suppress local SOx material for trapping 11 can be higher than the phenomenon of SOx release temperature.Thereby, can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition NOx at the SOx of the 5th mode of execution discharges in the control, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are preferably set to, and the total HC amount that is fed to NOx catalyzer 12 when whole HC supplies finishes equals the afore mentioned rules amount.
Then, the NOx of the Exhaust gas purifying device of the 6th mode of execution being discharged control describes.Discharge in the control at the NOx of the 6th mode of execution, set up and SOx when discharging rejection condition and being false, carry out discharging the identical control of control with the common NOx of above-mentioned the 1st mode of execution when the NOx release conditions.
On the other hand, in the NOx of the 6th mode of execution release is controlled, when NOx release conditions establishment SOx release rejection condition is also set up, carry out SOx release inhibition NOx release and control.Discharging inhibition NOx at this SOx discharges in the control, HC supply time and HC supply in HC fill rat in each HC supply, each HC supply are controlled at interval, be maintained less than NOx usually and discharge the dense degree of target in the control so that be supplied in the dense degree of the waste gas air fuel ratio of NOx catalyzer 12.That is, when the dense degree of the waste gas air fuel ratio that flows into NOx catalyzer 12 was big, the dense degree of waste gas air fuel ratio that flows into SOx material for trapping 11 was also big.So in this case, the air fuel ratio in the waste gas of inflow SOx material for trapping 11 just may produce local very dense zone.But, discharging inhibition NOx release control according to the SOx of the 6th mode of execution, the air fuel ratio that just can be suppressed in the waste gas that flows into SOx material for trapping 11 produces very dense zone, part.Therefore, the temperature that can suppress local SOx material for trapping 11 can be higher than the phenomenon of SOx release temperature.Thereby, can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharge at the SOx of the 6th mode of execution and to suppress NOx and discharge in the control, to the dense degree of the waste gas air fuel ratio of NOx catalyzer 12 supplies, the output of the air-fuel ratio sensor from the outlet pipe that for example is arranged on NOx catalyzer 12 downstreams is inferred.
In addition, as mentioned above, flow into the HC of SOx material for trapping 11, on a part of zone of meeting attached to SOx material for trapping 11.At this moment, when hanging down as if the temperature in SOx material for trapping 11 zones of having adhered to HC, the HC that adheres to can not burn and keep original attachment state.When rising to the combustion temperature of HC as if the temperature that is attached with SOx material for trapping 11 zones of HC, the HC that then adheres to just may once all burn.That is, the temperature of SOx material for trapping 11 is low more, attached to the just possible more once all burnings of the HC of this SOx material for trapping 11.Therefore, also can be, discharging inhibition NOx at the SOx of above-mentioned the 6th mode of execution discharges in the control, be maintained less than NOx usually in the dense degree of the waste gas air fuel ratio that will be supplied in NOx catalyzer 12 and discharge under the situation of the dense degree of target in the control, the temperature of SOx material for trapping 11 is low more, and the dense degree that just will be supplied in the waste gas air fuel ratio of NOx catalyzer 12 more is maintained littler.
The NOx that Fig. 7 represents to carry out embodiment of the present invention discharges an example of control flow.In the flow process of Fig. 7, at first in step 10, whether the NOx amount ∑ NOx that absorbed by NOx absorbing agent 47 is judged greater than tolerance α (∑ NOx〉α) (that is, whether the NOx release conditions is set up).At this moment, when judging ∑ NOx≤α, with regard to process ends.On the other hand, when judging ∑ NOx〉during α, then enter step 11, more whether the SOx amount of collected ∑ SOx of SOx material for trapping 11 is judged greater than established amount β (∑ SOx〉β) (that is, SOx discharge rejection condition whether set up).
In step 11, when judging ∑ SOx〉during β, then enter step 12, the SOx that carries out above-mentioned the 1st mode of execution～the 6th mode of execution discharges and suppresses NOx and discharge a kind of in the control.On the other hand, in step 11, when judging ∑ SOx≤β, then enter step 13, the common NOx that carries out above-mentioned the 1st mode of execution～the 6th mode of execution discharges a kind of in the control.
But, as mentioned above, when the amount of the particulate matter on being deposited in filter 12a surpasses tolerance (, when PM removal condition is set up), the waste gas air fuel ratio that implementation will flow into filter 12a is maintained thin the time, make the temperature of filter 12a rise to the above temperature of particulate matter combustion temperature (hereinafter referred to as " PM combustion temperature "), thus the control (hereinafter referred to as " PM removes control ") that the particulate matter that is deposited on the filter 12a is burnt and removes.Remove in the control at this PM, for the waste gas air fuel ratio that will flow into filter 12a is maintained the temperature that improves filter 12a thin the time, and is maintained in the thin scope, in waste gas, supplies HC by HC supply valve 14 in the waste gas air fuel ratio that flow into filter 12a.That is,, equal to filter 12a supply HC if to waste gas, supply HC from HC supply valve 14.At this moment, be maintained thinly if will flow into the waste gas air fuel ratio of filter 12a, then HC can burn on filter 12a, rises owing to the ignition heat that produces this moment makes the temperature of filter 12a.Basically when carrying out PM when removing control,, also, also be maintained thin so flow into the waste gas air fuel ratio of SOx material for trapping 11 owing to flow into the waste gas air fuel ratio of filter 12a and be maintained thinly even in waste gas, supply HC by HC supply valve 14.Therefore, can from SOx material for trapping 11, not discharge SOx basically this moment.
; in carrying out PM removal control; even flowing into the air fuel ratio of the waste gas of SOx material for trapping 11 is maintained thin; under the situation that the SOx of SOx material for trapping 11 amount of collected becomes more; there is the local dense zone of air fuel ratio in the waste gas of SOx material for trapping 11 and in SOx material for trapping 11, exists local temperature to be higher than the part of SOx release temperature if flow into, then might from the SOx material for trapping 11 of a part, discharge SOx.In addition, remove in the control, rise to the temperature more than the PM combustion temperature of higher temperature for the temperature that makes filter 12a, and by HC supply valve 14 supply HC, but a part can be burnt on SOx material for trapping 11 by the HC of HC supply valve 14 supplies at PM.Therefore, remove in the control carrying out PM, the temperature of SOx material for trapping 11 also can become than higher temperature, therefore, removes in the control carrying out PM, and temperature that also we can say local SOx material for trapping 11 becomes easily and is higher than the SOx release temperature.In a word, in carrying out PM removal control, in order to suppress from SOx material for trapping 11, to discharge SOx reliably, and become more for a long time in the SOx of SOx material for trapping 11 amount of collected, need suppress form the local dense zone of air fuel ratio in the waste gas that flow into SOx material for trapping 11, the phenomenon that perhaps needs temperature to the SOx material for trapping 11 of part to be higher than the SOx release temperature suppresses.
Therefore, in embodiments of the present invention, the PM that is deposited in the particulate matter on the filter 12a as removal removes control, when the SOx of SOx material for trapping 11 amount of collected is less than the afore mentioned rules amount, carry out the PM removal control (hereinafter referred to as " PM removes control usually ") of only particulate matter that is deposited on the filter 12a being burnt and removing, when the SOx of SOx material for trapping 11 amount of collected during more than the afore mentioned rules amount, then carry out when suppressing from SOx material for trapping 11, to discharge SOx, remove control (hereinafter referred to as " SOx discharge suppress PM remove control ") being deposited in the burn PM that removes of particulate matter on the filter 12a.
Then, the PM of the Exhaust gas purifying device of the 7th mode of execution being removed control describes.Remove in the control at the PM of the 7th mode of execution, when the amount of the particulate matter on being deposited in filter 12a surpasses tolerance (, when PM removal condition is set up), and when the SOx amount of collected of SOx material for trapping 11 is less than the afore mentioned rules amount (, when SOx release rejection condition is false), carry out common PM and remove control.Shown in Fig. 8 (A), remove in the control at this common PM, supply at interval (hereinafter referred to as " common HC supply at interval ") Id with default HC and supply number of times (hereinafter referred to as " HC supply number of times usually " with default HC, in Fig. 8 (A) institute example is three times), carry out the HC supply, the HC fill rat is default HC fill rat (hereinafter referred to as " HC fill rat usually ") Qd in this HC supply, and the HC supply time is default HC supply time (hereinafter referred to as " HC supply time usually ") Td.
And, remove in the control at the PM of the 7th mode of execution, HC supply time and HC supply number of times in HC fill rat in each HC supply, each HC supply are configured to, when making the temperature of filter 12a rise to the PM combustion temperature, the total HC amount that is supplied in filter 12a when whole HC supplies finishes only should be the enough HC amounts (hereinafter referred to as " regulation HC amount ") that the particulate matter on the filter 12a burns and removes and need that are deposited in to predetermined amount.Therefore, remove control, just can be only the amount of predesignating be deposited in the removal of burning of particulate matter on the filter 12a according to the common PM of the 7th mode of execution.
On the other hand, remove in the control, set up and the SOx amount of collected of SOx material for trapping 11 during when setting up (, SOx discharge rejection condition), carry out SOx and discharge and suppress PM and remove control more than the afore mentioned rules amount when PM removal condition at the PM of the 7th mode of execution.Shown in Fig. 8 (B), discharging inhibition PM at this SOx removes in the control, to supply number of times more number of times than the above-mentioned common HC supply interval Ie that Id is shorter at interval with than above-mentioned common HC, carry out the HC supply, in this HC supply, the HC fill rat is HC fill rat Qe and HC supply time the time T d for above-mentioned common HC supply time Td equate littler than above-mentioned common HC fill rat Qd.In this way, because the HC amount of being supplied in waste gas by HC supply valve 14 in HC supply once is less, be easy in waste gas, spread by the HC of HC supply valve 14 supplies.Therefore, owing to suppressed in waste gas, to form the phenomenon in dense zone, air fuel ratio part, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, shown in Fig. 8 (C), discharging inhibition NOx at the SOx of the 7th mode of execution discharges in the control, also can be to supply Id longer interval If in interval than above-mentioned common HC and to supply number of times identical number of times with above-mentioned common HC, carry out the HC supply, in this HC supply, the HC fill rat is than the littler HC fill rat Qe of above-mentioned common HC fill rat Qd, and the HC supply time is than the longer time T f of above-mentioned common HC supply time.In this way, because the HC fill rat in each HC supply is less, be easy in waste gas, spread by the HC of HC supply valve 14 supplies.Therefore, owing to suppressed in waste gas, to form the phenomenon in the local dense zone of air fuel ratio, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition PM at the SOx of the 7th mode of execution removes in the control, HC supply time in HC fill rat in each HC supply, each HC supply, HC supply interval and HC supply number of times are configured to, and can make the temperature of filter 12a rise to the PM combustion temperature at least.
In addition, discharging inhibition PM at the SOx of the 7th mode of execution removes in the control, be preferably, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set for, and the total HC amount that is supplied in filter 12a when whole HC supplies finishes equals the HC amount of afore mentioned rules.Therefore, in the example shown in Fig. 8 (B), as the HC fill rat, the time T d that equates with above-mentioned common HC supply time Td supplies number of times with the twice number of times of above-mentioned common HC supply number of times as HC as the HC supply time with half the HC fill rat Qe of above-mentioned common HC fill rat Qd.And, in the example shown in Fig. 8 (Bs), with above-mentioned common HC supply at interval Id half interval Ie as the HC supply at interval.
In addition, in the example shown in Fig. 8 (C), for when whole HC supplies finishes, make the total HC amount that is supplied in filter 12a equal the HC amount of afore mentioned rules, and with half the HC fill rat Qe of above-mentioned common HC fill rat Qd as the HC fill rat, the time T f of the twice of above-mentioned common HC supply time Td is as the HC supply time, and supplies number of times with the number of times identical with above-mentioned common HC supply number of times as HC.And, in the example shown in Fig. 8 (C), the interval of above-mentioned common HC supply 1.5 times of degree is at interval supplied at interval as HC.
Then, with reference to Fig. 9 the PM removal control of the Exhaust gas purifying device of the 8th mode of execution is described.And in Fig. 9 (A)～(C), the line of upside represents by the HC supply of HC supply valve 14 in waste gas, and the line of downside is illustrated in that the fuel from Fuelinjection nozzle 3 sprays in the second half of expansion stroke of specific cylinder or the exhaust stroke.
Remove in the control at the PM of the 8th mode of execution, set up and SOx when discharging rejection condition and being false, carry out common PM and remove control when PM removal condition.Shown in the line of the upside of Fig. 9 (A), remove in the control at this common PM, with interval Id equal and the number of times identical with common number of times with above-mentioned common HC supply interval Id, carry out the HC supply, in this HC supply, the HC fill rat is the HC fill rat Qd that equates with above-mentioned common HC fill rat Qd, and the HC supply time is the time T d that equates with above-mentioned common HC supply time Td.So, shown in the line of the downside of Fig. 9 (A), in any one cylinder, do not carry out back fuel injection this moment.Certainly, remove in the control at the common PM of the 8th mode of execution, HC supply time and HC supply number of times in HC fill rat in each HC supply, each HC supply are configured to, make the temperature of filter 12a rise to the PM combustion temperature, the total HC amount that is supplied in filter 12a simultaneously when whole HC supplies finishes equals the HC amount of afore mentioned rules.
On the other hand, the PM of the 8th mode of execution removes in the control, sets up and SOx when discharging rejection condition and also setting up when PM removal condition, carries out SOx and discharges and suppress PM and remove control.Shown in the line of the upside of Fig. 9 (B), discharging inhibition PM at this SOx removes in the control, with with above-mentioned common HC supply at interval the interval Id that equates of Id and with the identical number of times of above-mentioned common number of times, carry out the HC supply, in this HC supply, the HC fill rat is than the littler HC fill rat Qe of above-mentioned common HC fill rat Qd, and the HC supply time is the time T d that equates with above-mentioned common supply time, simultaneously, shown in the line of the downside of Fig. 9 (B), to supply number of times identical number of times with the above-mentioned common HC supply interval Idp that Id is equal at interval with above-mentioned common HC, carrying out back fuel sprays, during this back fuel sprayed, back fuel injection rate was than the littler back fuel injection rate Qep of above-mentioned common HC fill rat Qd, and the back fuel injection time is the time T dp that equates with above-mentioned common HC supply time Td.In this way, because the HC amount of being supplied in waste gas by HC supply valve 14 in HC supply once is less, be easy in waste gas, spread by the HC of HC supply valve 14 supplies.Therefore, by HC, just can be suppressed at the phenomenon that produces the local dense zone of air fuel ratio in the waste gas by 14 supplies of HC supply valve.And then in the second half or exhaust stroke of the expansion stroke of specific cylinder, the fuel that is sprayed by Fuelinjection nozzle 3 is because the heat in the cylinder is modified and lighting.So this fuel by lighting is easy to spread in waste gas.Therefore, by the fuel that in the second half of the expansion stroke of specific cylinder or exhaust stroke, sprays, just can be suppressed at the phenomenon in very dense zone, generation air fuel ratio part in the waste gas by Fuelinjection nozzle 3.Therefore, can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, shown in Fig. 9 (C), discharge inhibition PM at the SOx of the 8th mode of execution and remove in the control, also can only pass through back fuel injection to filter 12a supply HC (fuel).Promptly, shown in the line of the downside of Fig. 9 (C), also can be to supply number of times identical number of times with the above-mentioned common HC supply interval Idp that Id is equal at interval with above-mentioned common HC, carrying out back fuel sprays, during this back fuel sprays, back fuel injection rate is the back fuel injection rate Qdp that equates with above-mentioned common HC fill rat Qd, and the back fuel injection time is the time T dp that equates with above-mentioned common HC supply time Td.Certainly, shown in the line of the upside of Fig. 9 (C), do not carry out this moment by the HC supply of HC supply valve 14 in waste gas.In this way, since by SOx material for trapping 11 to filter 12a supplied fuel (HC) by the fuel of lighting, so be easy in waste gas, spread.Therefore, owing to suppressed in waste gas, to produce the phenomenon in very dense zone, air fuel ratio part, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition NOx at the SOx of the 8th mode of execution discharges in the control, HC supply time in HC fill rat in each HC supply, each HC supply, HC supply interval and HC supply number of times are configured to, and can make the temperature of filter 12a rise to the PM combustion temperature at least.
And, discharging inhibition PM at the SOx of the 8th mode of execution removes in the control, be preferably, back fuel injection time and back fuel injecting times during back fuel injection rate, each back fuel during HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times and each back fuel sprayed sprays are set for, spray HC (fuel) amount that total HC (fuel) amount that is supplied in filter 12a when finishing equals afore mentioned rules in whole HC supplies and whole back fuel.In the example shown in Fig. 9 (B), with half the HC fill rat Qe of above-mentioned common HC fill rat Qd as the HC fill rat, the time T d that equates with above-mentioned common HC supply time Td is as the HC supply time, supply number of times with the number of times that above-mentioned common HC supply number of times equates as HC, with above-mentioned common HC fill rat Qd half back fuel injection rate Qdp as the back fuel injection rate, the time T dp that equates with above-mentioned common HC supply time Td is as the back fuel injection time, and the number of times that equates with above-mentioned common HC supply number of times is as back fuel injecting times.And in the example shown in Fig. 9 (B), interval Id, the Idp that will equate with above-mentioned common HC supply interval Id is as HC supply interval and back fuel injection interval respectively.
In addition, in the example shown in Fig. 9 (C), in order to spray HC (fuel) amount that total HC (fuel) amount that is supplied in filter 12a when finishing equals afore mentioned rules in whole HC supplies and whole back fuel, and the back fuel injection rate Qdp that will equate with above-mentioned common HC fill rat Qd is as the back fuel injection rate, the time T dp that equates with above-mentioned common HC supply time Td is as the back fuel injection time, and the number of times that equates with above-mentioned common HC supply number of times is as back fuel injecting times.And in the example shown in Fig. 9 (C), the interval Idp that will equate with above-mentioned common HC supply interval Id is as back fuel injection interval.
And, in example shown in Figure 9, be shown as, back fuel sprays with the HC supply and carries out in same timing, but because back fuel injection timing is controlled according to the crank angle of internal-combustion engine, so strictly speaking, as a rule, back fuel injection timing is asynchronous with HC supply timing, and has a little bias.In addition, in example shown in Figure 9, equate at interval with common HC supply, but based on same reason, strictly speaking, back fuel injection interval is asynchronous at interval with common HC supply as a rule, and has a little bias although understand back fuel injection interval.
Then, the PM of the Exhaust gas purifying device of the 9th mode of execution being removed control describes.Remove in the control at the PM of the 9th mode of execution, when PM removal condition establishment SOx release rejection condition is false, carry out removing the identical control of control with the common PM of the 7th mode of execution.
On the other hand, remove in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress PM and remove control when PM removal condition at the PM of the 9th mode of execution.Discharging inhibition PM at this SOx removes in the control, identical with the common NOx release control of the 7th mode of execution, supply number of times with common HC fill rat, common HC supply time and common HC supply interval and common HC, carry out each HC supply, but prepare in advance by fractionation by the HC of lighting, with the part of the HC that supplies in waste gas by HC supply valve 14 in each HC supply as this by the HC of lighting.As mentioned above, be easy in waste gas, spread by the HC of lighting.Therefore, owing to suppressed in waste gas, to produce the phenomenon in dense zone, air fuel ratio part, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
Then, the PM of the Exhaust gas purifying device of the 10th mode of execution being removed control describes.Remove in the control at the PM of the 10th mode of execution, when PM removal condition establishment SOx release rejection condition is false, carry out removing the identical control of control with the common PM of the 7th mode of execution.
On the other hand, remove in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress PM and remove control when PM removal condition at the PM of the 10th mode of execution.Discharging inhibition PM at this SOx removes in the control, HC supply time and HC supply in HC fill rat in each HC supply, each HC supply are controlled at interval, and the temperature of SOx material for trapping 11 is maintained the once whole temperature when burned of HC in the waste gas that is lower than SOx material for trapping 11.In this way, even in waste gas, form the local dense zone of air fuel ratio, also can suppress HC and in SOx material for trapping 11, carry out once all phenomenons of burning.Therefore, be higher than the SOx release temperature owing to suppressed the temperature of local SOx material for trapping 11, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition PM at the SOx of the 10th mode of execution removes in the control, HC supply time in HC fill rat in each HC supply, each HC supply, HC supply interval and HC supply number of times are configured to, and can make the temperature of filter 12a rise to the PM combustion temperature at least.
In addition, discharging inhibition PM at the SOx of the 10th mode of execution removes in the control, be preferably, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set for, and the total HC amount that is supplied in filter 12a when whole HC supplies finishes equals the HC amount of afore mentioned rules.
Then, the PM of the Exhaust gas purifying device of the 11st mode of execution being removed control describes.Remove in the control at the PM of the 11st mode of execution, when PM removal condition establishment SOx release rejection condition is false, carry out removing the identical control of control with the common PM of the 7th mode of execution.
On the other hand, remove in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress PM and remove control when PM removal condition at the PM of the 11st mode of execution.Discharge at this SOx and to suppress PM and remove in the control, HC supply time and HC supply in the HC fill rat in each HC supply, each HC supply are controlled at interval, so that the temperature of filter 12a is maintained as far as possible the temperature near the PM combustion temperature.In this way, the HC fill rat in the HC supply is set to less, and the HC supply time during perhaps a HC supplies is set to shorter, and perhaps the HC supply is set to longer at interval.Therefore, the HC that is supplied by HC supply valve 14 becomes and is easy to spread in waste gas.Owing to suppressed in waste gas, to form the phenomenon in the local dense zone of air fuel ratio, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition PM at the SOx of the 11st mode of execution removes in the control, HC supply time in HC fill rat in each HC supply, each HC supply, HC supply interval and HC supply number of times are configured to, and can make the temperature of filter 12a rise to the PM combustion temperature at least.
In addition, discharging inhibition PM at the SOx of the 11st mode of execution removes in the control, be preferably, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set for, and the total HC amount that is supplied in filter 12a when in whole HC supply end equals the HC amount of afore mentioned rules.In this case, carry out SOx and discharge the time of suppressing PM removal control, be longer than and carry out the time that common PM removes control.
Then, the PM of the Exhaust gas purifying device of the 12nd mode of execution being removed control describes.Remove in the control at the PM of the 12nd mode of execution, when PM removal condition establishment SOx release rejection condition is false, carry out removing the identical control of control with the common PM of the 7th mode of execution.
On the other hand, remove in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress PM and remove control when PM removal condition at the PM of the 12nd mode of execution.Discharging inhibition PM at this SOx removes in the control, HC supply time and HC supply in HC fill rat in each HC supply, each HC supply are controlled at interval, thereby the temperature of SOx material for trapping 11 is risen or decline scope (hereinafter referred to as " temperature amplitude ") is maintained to be lower than at PM usually and removes the temperature amplitude of the SOx material for trapping 11 of being allowed in the control.In this way, compare with carrying out common PM removal control, the HC fill rat in each HC supply is set to less, and the HC supply time during perhaps each HC supplies is set to shorter, and perhaps HC supply interval is set to longer.Therefore, the HC by 14 supplies of HC supply valve is easy to spread in waste gas.Owing to suppressed in waste gas, to form the phenomenon in the local dense zone of air fuel ratio, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition PM at the SOx of the 12nd mode of execution removes in the control, HC supply time in HC fill rat in each HC supply, each HC supply, HC supply interval and HC supply number of times are set to, and can make the temperature of filter 12a rise to the PM combustion temperature at least.
In addition, discharging inhibition PM at the SOx of the 12nd mode of execution removes in the control, be preferably, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set at, and the total HC amount that is supplied in filter 12a when whole HC supplies finishes equals the HC amount of afore mentioned rules.
Then, the PM of the Exhaust gas purifying device of the 13rd mode of execution being removed control describes.Remove in the control at the PM of the 13rd mode of execution, when PM removal condition establishment SOx release rejection condition is false, carry out removing the identical control of control with the common PM of the 7th mode of execution.
On the other hand, remove in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress PM and remove control when PM removal condition at the PM of the 13rd mode of execution.Discharging inhibition PM at this SOx removes in the control, HC supply time and HC supply in HC fill rat in each HC supply, each HC supply are controlled at interval, be maintained greater than PM usually and remove target rarefied content in the control so that be supplied in the rarefied content of the waste gas air fuel ratio of filter 12a.That is, when the rarefied content of the waste gas air fuel ratio of inflow filter 12a hour, the rarefied content of air fuel ratio that flows into the waste gas of SOx material for trapping 11 also diminishes.So in this case, in the waste gas that flows into SOx material for trapping 11, might form the local dense zone of air fuel ratio.But, if discharge inhibition PM removal control according to the SOx of the 13rd mode of execution, owing to suppressed the phenomenon in dense zone, formation air fuel ratio part in the waste gas that flows into SOx material for trapping 11, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition PM at the SOx of the 13rd mode of execution removes in the control, HC supply time in HC fill rat in each HC supply, each HC supply, HC supply interval and HC supply number of times are configured to, and can make the temperature of filter 12a rise to the PM combustion temperature at least.
In addition, discharging inhibition PM at the SOx of the 13rd mode of execution removes in the control, be preferably, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set for, when whole HC supplies finishes, made the total HC amount that is supplied in filter 12a equal the HC amount of afore mentioned rules.
In addition, discharging at the SOx of the 13rd mode of execution and to suppress PM and remove in the control, to the rarefied content of the air fuel ratio of the waste gas of filter 12a supply, is the output by the air-fuel ratio sensor on the outlet pipe that for example is installed in filter 12a downstream, and infer.
Then, the PM of the Exhaust gas purifying device of the 14th mode of execution being removed control describes.Remove in the control at the PM of the 14th mode of execution, when PM removal condition establishment SOx release rejection condition is false, carry out removing the identical control of control with the common PM of the 7th mode of execution.
On the other hand, remove in the control, set up and SOx when discharging rejection condition and also setting up, carry out SOx and discharge and suppress PM and remove control when PM removal condition at the PM of the 14th mode of execution.Discharging inhibition PM at this SOx removes in the control, HC supply time and HC supply in HC fill rat in each HC supply, each HC supply are controlled at interval, and the specific temperature rise the when temperature of filter 12a is risen is maintained less than the target temperature climbing of removing at PM usually in the control.In this way, the HC fill rat in the HC supply is set to less, and the HC supply time during perhaps a HC supplies is set to shorter, and perhaps the HC supply is set to longer at interval.Therefore, the HC by 14 supplies of HC supply valve is easy to spread in waste gas.Owing to suppressed in waste gas, to form the phenomenon in the local dense zone of air fuel ratio, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
And, discharging inhibition PM at the SOx of the 14th mode of execution removes in the control, HC supply time in HC fill rat in each HC supply, each HC supply, HC supply interval and HC supply number of times are suppressed and are set for, can make the temperature of filter 12a rise to the PM combustion temperature at least.
In addition, discharging inhibition PM at the SOx of the 14th mode of execution removes in the control, be preferably, HC supply time in HC fill rat in each HC supply, each HC supply and HC supply number of times are set at, and the total HC amount that is supplied in filter 12a when whole HC supplies finishes equals the HC amount of afore mentioned rules.
The PM that Figure 10 has represented to carry out embodiment of the present invention removes an example of control flow.In the flow process of Figure 10, at first in step 20, whether the amount ∑ PM that is deposited in the particulate matter on the filter 12a is judged more than admissible value γ (∑ PM〉γ) (that is, PM remove condition whether set up).At this moment, when judging ∑ PM≤γ, with regard to process ends.On the other hand, when judging ∑ PM〉during γ, then enter step 21, more whether the SOx amount of collected ∑ SOx of SOx material for trapping 11 is judged more than established amount β (∑ SOx〉β) (that is, SOx discharge rejection condition whether set up).
In step 21, when judging ∑ SOx〉during β, then enter step 22, the SOx that carries out above-mentioned the 7th mode of execution～the 14th mode of execution discharges and suppresses PM and remove a kind of in the control.On the other hand, in step 21, when judging ∑ SOx≤β, then enter step 23, the SOx that carries out above-mentioned the 7th mode of execution～the 14th mode of execution discharges and suppresses PM and remove a kind of in the control.
But, when will be when NOx absorbing agent 47 discharges NOx, under the temperature of SOx material for trapping 11 situation higher than SOx release temperature, if make NOx absorbing agent 47 discharge NOx and when HC supply valve 14 is supplied HC to waste gas, can cause from SOx material for trapping 11, discharging SOx.Therefore, NOx as the Exhaust gas purifying device of the 15th mode of execution discharges control, also can be, when wanting clump NOx absorbing agent 47 to discharge NOx (, when the NOx release conditions is set up), under the temperature of SOx material for trapping 11 situation higher, forbid in waste gas, supplying HC (that is, carrying out the NOx release control of above-mentioned mode of execution) by HC supply valve 14 than SOx release temperature.In this way, can suppress reliably from SOx material for trapping 11, to discharge SOx.
The NOx that Figure 11 has represented to carry out the 15th mode of execution discharges an example of control flow.In the flow process of Figure 11, at first in step 30, whether the amount ∑ NOx of the NOx that absorbed by NOx absorbing agent 47 is judged more than admissible value α (∑ NOx〉α) (that is, whether the NOx release conditions is set up).At this moment, when judging ∑ NOx≤α, with regard to process ends.On the other hand, when judging ∑ NOx〉during α, then enter step 31, again to the temperature T sox of SOx material for trapping 11 whether more than or equal to SOx release temperature Tth (Tsox ≧ Tth) judge.
In step 31, when judging Tsox ≧ Tth, then enter step 32, forbid carrying out NOx and discharge control.That is, in this case, do not carry out NOx and discharge control.On the other hand, in step 31, when judging Tsox＜Tth, then enter step 33, more whether the SOx amount of collected ∑ SOx of SOx material for trapping 11 is judged more than established amount β (∑ SOx〉β) (that is, SOx discharge rejection condition whether set up).
In step 33, when judging ∑ SOx〉during β, then enter step 34, the SOx that carries out above-mentioned the 1st mode of execution～the 6th mode of execution discharges and suppresses NOx and discharge a kind of in the control.On the other hand, in step 33, when judging ∑ SOx≤β, then enter step 35, the common NOx that carries out above-mentioned the 1st mode of execution～the 6th mode of execution discharges a kind of in the control.
But, remove control as the PM of the Exhaust gas purifying device of the 16th mode of execution, also can adopt following control.Promptly, as mentioned above, in carrying out PM removal control, the temperature of SOx material for trapping 11 can become than higher, here, the temperature of SOx material for trapping 11 is higher than the occasion of SOx release temperature, and the occasion that is lower than the SOx release temperature with the temperature of SOx material for trapping 11 is compared, and should be suppressed at more effectively the former and form the local dense zone of air fuel ratio in the waste gas.Therefore, remove in the control at the PM of the 16th mode of execution, set up and SOx when discharging rejection condition and being false when PM removal condition, the common PM that carries out above-mentioned the 7th mode of execution～the 14th mode of execution removes a kind of in the control.
On the other hand, remove in the control, set up and SOx when discharging rejection condition and also setting up, judge whether the temperature of SOx material for trapping 11 is higher than the SOx release temperature when PM removal condition at the PM of the 16th mode of execution.Here, when the temperature of SOx material for trapping 11 was lower than the SOx release temperature, the SOx that carries out above-mentioned the 7th mode of execution～the 14th mode of execution discharge to suppress PM and removes a kind of in the control.On the other hand, when the temperature of SOx material for trapping 11 is higher than the SOx release temperature, the SOx that is implemented when carrying out being lower than the SOx release temperature with the temperature of SOx material for trapping 11 discharges and suppresses PM and remove the identical control of control, but HC fill rat at this moment is set at, and the SOx that is carried out when being lower than the SOx release temperature less than the temperature at SOx material for trapping 11 discharges the HC fill rat that suppresses in the PM removal control.In this way, because the amount of the HC that is supplied by HC supply valve 14 in HC supply once is less, be easy in waste gas, spread by the HC of HC supply valve 14 supplies.Therefore, owing to suppressed in waste gas, to form the phenomenon in the local dense zone of air fuel ratio, so can suppress from SOx material for trapping 11, to discharge SOx.
Perhaps, also can be, remove in the control at the PM of above-mentioned the 16th mode of execution, when PM removal condition is set up, when SOx release rejection condition is also set up, and when the temperature of SOx material for trapping 11 is higher than the SOx release temperature, with the HC fill rat in each HC supply, HC supply time and HC supply in each HC supply are controlled at interval, the temperature of SOx material for trapping 11 rises or decline scope (temperature amplitude) is maintained, and the SOx that carries out when being lower than the SOx release temperature less than the temperature at SOx material for trapping 11 discharges and suppresses the temperature amplitude that PM removes the SOx material for trapping 11 of being allowed in the control.In this way, discharging inhibition PM removal control with the SOx that carries out being implemented when the temperature of SOx material for trapping 11 is lower than the SOx release temperature compares, HC fill rat in each HC supply is set to less, HC supply time during perhaps each HC supplies is set to shorter, and perhaps the HC supply is set to longer at interval.So, be easy in waste gas, spread by the HC of HC supply valve 14 supplies.Owing to suppressed in waste gas, to form the phenomenon in the local dense zone of air fuel ratio, so can suppress reliably from SOx material for trapping 11, to discharge SOx.
The PM that Figure 12 has represented to carry out the 16th mode of execution removes an example of control flow.In the flow process of Figure 12, at first in step 40, whether the amount ∑ PM that is deposited in the particulate matter on the filter 12a is judged more than admissible value γ (∑ PM〉γ) (that is, PM remove condition whether set up).At this moment, when judging ∑ PM≤γ, with regard to process ends.And when judging ∑ PM during γ, then enter step 41, more whether the SOx amount of collected ∑ SOx of SOx material for trapping 11 is judged more than established amount β (∑ SOx〉β) (that is, SOx discharge rejection condition whether set up).
In step 41, when judging ∑ SOx≤β, then enter step 45, the common PM that carries out the 7th mode of execution～the 14th mode of execution removes a kind of in the control.On the other hand, in step 41, when judging ∑ SOx〉during β, then enter step 42, to the temperature T sox of SOx material for trapping 11 whether more than or equal to SOx release temperature Tth (Tsox ≧ Tth) judge.
In step 42, when judging Tsox＜Tth, then enter step 44, carry out SOx and discharge and suppress PM and remove control II.Discharge at this SOx and to suppress PM and remove among the control II, the SOx that carries out the 7th mode of execution～the 14th mode of execution discharges and suppresses PM and remove a kind of in the control.On the other hand, in step 42, when judging Tsox ≧ Tth, then enter step 45, carry out SOx and discharge and suppress PM and remove control I.PM removes among the control I in this SOx release inhibition, carry out discharging the identical control of inhibition PM removal control II with the SOx of step 44, but here, the HC fill rat that the HC fill rat is set at, discharges among the inhibition PM removal control II than the SOx in step 44 is littler.
But, discharge control as the NOx of the Exhaust gas purifying device of the 17th mode of execution, also can adopt following control.Promptly, discharge in the control at the NOx of the 17th mode of execution, when the rarefied content of the waste gas air fuel ratio of being discharged by each cylinder was set up greater than default rarefied content (to call " rarefied content of regulation " in the following text) and NOx release conditions, the common NOx that carries out the 1st mode of execution～the 6th mode of execution discharged a kind of in the control.On the other hand, when the rarefied content of the waste gas air fuel ratio of being discharged by each cylinder was set up less than the rarefied content of regulation and NOx release conditions, the SOx that carries out the 1st mode of execution～the 6th mode of execution discharged and suppresses NOx and discharge one in the control.In this way, can suppress reliably from SOx material for trapping 11, to discharge SOx.
That is, when the rarefied content of the waste gas air fuel ratio of being discharged by each cylinder during less than the rarefied content of regulation, the air fuel ratio of waste gas can approach dense air fuel ratio.At this moment, discharge control, just very likely in the waste gas that flows into SOx material for trapping 11, form very dense zone, air fuel ratio part, therefore, also very likely make the temperature of local SOx material for trapping 11 be higher than the SOx release temperature if carry out NOx.Therefore, when carrying out NOx release control, for the rarefied content of the air fuel ratio that is suppressed at the waste gas of discharging reliably during, from SOx material for trapping 11, discharge SOx less than the rarefied content of regulation by each cylinder, form very dense zone, air fuel ratio part in the waste gas and need be suppressed at, and need the temperature of the local SOx material for trapping 11 of inhibition higher than SOx release temperature.Therefore, discharge in the control at the NOx of the 17th mode of execution, when the rarefied content of the waste gas air fuel ratio of being discharged by each cylinder during less than the rarefied content of regulation, the SOx that carries out the 1st mode of execution～the 6th mode of execution discharges and suppresses NOx and discharge a kind of in the control.
But, remove control as the PM of the Exhaust gas purifying device of the 18th mode of execution, also can adopt following control.Promptly, remove in the control at the PM of the 18th mode of execution, when the rarefied content of the air fuel ratio of the waste gas of discharging by each cylinder greater than default rarefied content (to call " rarefied content of regulation " in the following text), and when PM removed condition and also sets up, the common PM that carries out the 7th mode of execution～the 14th mode of execution removed a kind of in the control.On the other hand, when the rarefied content of the air fuel ratio of the waste gas of being discharged by each cylinder rarefied content less than regulation, and PM removal condition is when setting up, and the SOx that carries out the 7th mode of execution～the 14th mode of execution discharges and suppresses PM and remove a kind of in the control.In this way, can suppress reliably from SOx material for trapping 11, to discharge SOx.
That is, when the rarefied content of the air fuel ratio of the waste gas of being discharged by each cylinder during less than the rarefied content of regulation, the air fuel ratio of waste gas can approach dense air fuel ratio.At this moment, remove control, just very likely in the waste gas that flows into SOx material for trapping 11, form the local dense zone of air fuel ratio if carry out PM.Therefore, when carrying out PM removal control, from SOx material for trapping 11, discharge SOx for the rarefied content that is suppressed at the waste gas air fuel ratio of discharging reliably during less than the regulation rarefied content, form the local dense zone of air fuel ratio in the waste gas and need be suppressed at by each cylinder.Therefore, remove in the control at the PM of the 18th mode of execution, when the rarefied content of the waste gas air fuel ratio of being discharged by each cylinder during less than the rarefied content of regulation, the SOx that carries out the 7th mode of execution～the 14th mode of execution discharges and suppresses PM and remove a kind of in the control.
And, remove in the control at the PM of the 18th mode of execution, also can be, to forbid carrying out PM and remove control when the rarefied content of the waste gas air fuel ratio of discharging during less than the rarefied content of regulation by each cylinder.In this way, can suppress reliably from SOx material for trapping 11, to discharge SOx.
In addition, the NOx of above-mentioned mode of execution discharges control and PM removes control, also applicable to compression ignition internal combustion engine shown in Figure 13.Internal-combustion engine shown in Figure 13, identical with internal-combustion engine shown in Figure 1, but in internal-combustion engine shown in Figure 13, simultaneously NOx catalyzer 12 is set by the particulate filter 12a that only is used to capture particulate matter is set in the downstream of SOx material for trapping 11, replaces being carried on the NOx catalyzer 12 on the filter 12a in the downstream of this particulate filter 12a.So, in internal-combustion engine shown in Figure 13, when the NOx absorbing agent that will make NOx catalyzer 12 discharges NOx, adopt the NOx of above-mentioned mode of execution to discharge control.In addition, in internal-combustion engine shown in Figure 13,, adopt the PM of above-mentioned mode of execution to remove control when burning when removing to being deposited in particulate matter on the particulate filter 12a.
And, in internal-combustion engine shown in Figure 13, on particulate filter 12a, be equipped with and be used to the differential pressure transducer 23 that detects the temperature transducer 22 of this particulate filter 12a temperature and be used to detect the front and back differential pressure of this particulate filter 12a.In addition, on NOx catalyzer 12, the temperature transducer 24 that is used to detect these NOx catalyzer 12 temperature is installed.
In addition, the NOx of above-mentioned mode of execution discharges control and PM removes control, also applicable to compression ignition internal combustion engine shown in Figure 14.Internal-combustion engine shown in Figure 14 is identical with internal-combustion engine shown in Figure 1, but in internal-combustion engine shown in Figure 14, be provided with by downstream that the downstream at this NOx catalyzer 12 is provided with the particulate filter 12a that only is used to capture particulate matter in the NOx catalyzer 12, replace being carried on the NOx catalyzer 12 on the filter 12a at SOx material for trapping 11.So, in internal-combustion engine shown in Figure 14, when the NOx absorbing agent that will make NOx catalyzer 12 discharges NOx, adopt the NOx of above-mentioned mode of execution to discharge control.In addition, in internal-combustion engine shown in Figure 14,, adopt the PM of above-mentioned mode of execution to remove control when burning when removing to being deposited in particulate matter on the particulate filter 12a.
In addition, as shown in figure 15, the oxidability that also can be provided with in internal-combustion engine shown in Figure 1 than SOx material for trapping 11 has the more oxidation catalyst 26 of high oxidative capacity, and this oxidation catalyst 26 is oxygenants that the HC that supplies to waste gas from HC supply valve 14 in the upstream of SOx material for trapping 11 is carried out oxidation.In this case, owing to oxidized catalyzer 26 oxidations of HC of in waste gas, supplying, so can be suppressed at the phenomenon that forms the local dense zone of air fuel ratio in the waste gas reliably by HC supply valve 14.
In addition, also can be, in the Exhaust gas purifying device of above-mentioned mode of execution, the heater that this HC supply valve 14 is heated is installed on HC supply valve 14, in common NOx release control or during the PM removal is controlled usually, when in waste gas, supplying HC by HC supply valve 14, HC supply valve 14 is not heated by above-mentioned heater, but discharge in control or the SOx release inhibition PM removal control at SOx release inhibition NOx, when in waste gas, supplying HC, HC supply valve 14 is heated by heater by HC supply valve 14.In this way, discharge to suppress NOx at SOx and discharge control or SOx and discharge and suppress PM and remove in the control, owing to be easy to waste gas, spread from the HC of HC supply valve 14 supplies, so can suppress from SOx material for trapping 11, to discharge SOx.
In addition, also can be, discharge in control or the SOx release inhibition PM removal control at the SOx of above-mentioned mode of execution release inhibition NOx, to be set as from HC supply valve 14 is supplied HC to waste gas pressure, be higher than NOx usually discharge control or usually PM remove the pressure of in waste gas, supplying HC in the control by HC supply valve 14.In this way, discharge to suppress NOx at SOx and discharge control or SOx and discharge and suppress PM and remove in the control, owing to be easy to waste gas, spread from the HC of HC supply valve 14 supplies, so can suppress from SOx material for trapping 11, to discharge SOx.
In addition, in the Exhaust gas purifying device of above-mentioned mode of execution, as HC supply valve 14, also can adopt supply orifice with a plurality of supply HC and the HC supply valve that can suitably change the supply orifice number of supplying HC, discharge in control or the SOx release inhibition PM removal control at SOx release inhibition NOx, when in waste gas, supplying HC by HC supply valve 14, with the number of supply orifice of supply HC be set as more than NOx usually discharge control or usually PM remove the number of the supply orifice of supply HC in the control.In this way, discharge to suppress NOx at SOx and discharge control or SOx and discharge and suppress PM and remove in the control, be easy to waste gas, spread owing to become, so can suppress from SOx material for trapping 11, to discharge SOx from the HC of HC supply valve 14 supplies.
In addition, in the scope that does not produce contradiction, can discharge control to several NOx of above-mentioned a plurality of mode of executions and make up, also can in the scope that does not produce contradiction, the several PM removal controls to above-mentioned a plurality of mode of executions make up.
In addition, the NOx of the mode of execution except above-mentioned the 2nd mode of execution, the 3rd mode of execution, the 8th mode of execution and the 9th mode of execution discharges control or PM removes control, also go for those HC supply and in waste gas, do not supply HC by HC supply valve 14, and in the second half of the expansion stroke of specific cylinder or exhaust stroke by the internal-combustion engine of Fuelinjection nozzle 3 burner oils.
In addition, describe the present invention, but concerning those skilled in the art,, can carry out various changes, correction not exceeding on claim scope of the present invention and the idea according to specific mode of execution.
Claims (14)
1, a kind of Exhaust gas purifying device of internal-combustion engine, the SOx material for trapping that will be used for capture in flue gas SOx is arranged in the exhaust passage, when the air fuel ratio of the waste gas that flows into this SOx material for trapping is the air fuel ratio rarer than chemically correct fuel, and when the temperature of this SOx material for trapping was lower than preset temperature, this SOx material for trapping was with regard to the SOx in the capture in flue gas; When the air fuel ratio of the waste gas that flows into this SOx material for trapping is chemically correct fuel or the air fuel ratio denseer than this chemically correct fuel, and the temperature of this SOx material for trapping is when being higher than described preset temperature, and this SOx material for trapping is just with the SOx release of capture; When pre-conditioned establishment, carry out the HC supply control of supply HC in waste gas in the upstream of SOx material for trapping, it is characterized in that,
When the amount of the SOx that captures when the SOx material for trapping is less than predetermined amount, carry out HC supply control, promptly in waste gas, supply HC in SOx material for trapping upstream with preset mode as described HC supply control; When the SOx of SOx material for trapping capture measures more than described predetermined amount, carry out the 2nd HC supply control as described HC supply control, promptly be higher than described preset temperature with SOx material for trapping temperature different with described preset mode and that inhibition is local, perhaps be suppressed at the pattern that forms the local dense zone of air fuel ratio in the waste gas that flows into the SOx material for trapping, in waste gas, supply HC in the upstream of SOx material for trapping.
2, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 1 is characterized in that, in the described HC supply control, at the HC of the upstream of SOx material for trapping supplying unit time predetermined amount in waste gas; In described the 2nd HC supply control, in waste gas, supply the HC that is less than described unit time predetermined amount in the upstream of SOx material for trapping.
3, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 1, it is characterized in that, in described the 2nd HC supply control, the HC that supplies in waste gas in the upstream of SOx material for trapping in the upstream of SOx material for trapping is supplied than described HC supply control in waste gas has the diffusible HC in the higher waste gas.
4, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 2, it is characterized in that, in described the 2nd HC supply control, when supplying HC in the upstream of SOx material for trapping in waste gas, the rarefied content that flows into the waste gas air fuel ratio of SOx material for trapping is maintained greater than default rarefied content.
5, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 3, it is characterized in that, in described the 2nd HC supply control, when supplying HC in the upstream of SOx material for trapping in waste gas, the rarefied content that flows into the waste gas air fuel ratio of SOx material for trapping is maintained greater than default rarefied content.
6, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 4 is characterized in that, described default rarefied content is set to, and low more this rarefied content of the temperature of SOx material for trapping is just big more.
7, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 5 is characterized in that, described default rarefied content is set to, and low more this rarefied content of the temperature of SOx material for trapping is just big more.
8, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 1, it is characterized in that, in described the 2nd HC supply control, when in waste gas, supplying HC in the upstream of SOx material for trapping, the local temperature ascending amount of the SOx material for trapping of unit time is maintained, the local temperature ascending amount of the SOx material for trapping of the unit time of being allowed in controlling less than described HC supply.
9, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 8, it is characterized in that, in described the 2nd HC supply control, when in waste gas, supplying HC in the upstream of SOx material for trapping, all temperature ascending amounts of the SOx material for trapping of unit time are maintained, all temperature ascending amounts of the SOx material for trapping of the unit time of being allowed in controlling less than described HC supply.
10, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 8, it is characterized in that, in the exhaust passage in described SOx material for trapping downstream, be provided with the particulate filter of the particulate matter in the capture in flue gas, describedly one of pre-conditioned be, be judged as the temperature that needs this particulate filter and rise to preset target temperature is removed the particulate matter that this particulate filter was captured with burning fuel removal condition, when this burning removal condition is set up and when carrying out described the 2nd HC supply control, the 2nd HC supplies control, the temperature that will be lower than described burning removal condition establishment and carry out described HC supply the described target temperature in the HC supply control when controlling is supplied HC as target temperature in the upstream of SOx material for trapping in waste gas.
11, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 9, it is characterized in that, in described the 2nd HC supply control, when supplying HC in the upstream of SOx material for trapping in waste gas, the temperature amplitude of SOx material for trapping is maintained the temperature amplitude less than the SOx material for trapping of being allowed in the described HC supply control.
12, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 10, it is characterized in that, in described the 2nd HC supply control, when supplying HC in the upstream of SOx material for trapping in waste gas, the temperature amplitude of SOx material for trapping is maintained the temperature amplitude less than the SOx material for trapping of being allowed in the described HC supply control.
13, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 8, it is characterized in that, in the exhaust passage in described SOx material for trapping downstream, be provided with the NOx absorbing agent that absorbs NOx in the waste gas, describedly one of pre-conditioned be, be judged as the NOx release conditions that need discharge NOx from the NOx absorbing agent, when this NOx release conditions is set up and when carrying out described the 2nd HC supply control, in the 2nd HC supply control, HC is supplied to waste gas in upstream at the SOx material for trapping, thereby the temperature amplitude of SOx material for trapping is maintained, sets up and the temperature amplitude of the SOx material for trapping of being allowed in the one HC supply control when carrying out described HC supply control less than described NOx release conditions.
14, the Exhaust gas purifying device of internal-combustion engine as claimed in claim 1 is characterized in that, in the exhaust passage of described SOx material for trapping upstream, the oxidability that is provided with than this SOx material for trapping has the more oxidation catalyst of high oxidative capacity.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006181380A JP4404073B2 (en) | 2006-06-30 | 2006-06-30 | Exhaust gas purification device for internal combustion engine |
| JP181380/2006 | 2006-06-30 | ||
| PCT/JP2007/063508 WO2008001950A1 (en) | 2006-06-30 | 2007-06-29 | Exhaust gas purifier for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101484670A true CN101484670A (en) | 2009-07-15 |
| CN101484670B CN101484670B (en) | 2011-09-28 |
Family
ID=38845701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800250024A Expired - Fee Related CN101484670B (en) | 2006-06-30 | 2007-06-29 | Exhaust gas purifier for internal combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20090249768A1 (en) |
| EP (1) | EP2039900B1 (en) |
| JP (1) | JP4404073B2 (en) |
| CN (1) | CN101484670B (en) |
| WO (1) | WO2008001950A1 (en) |
Cited By (1)
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| CN103097680A (en) * | 2011-08-29 | 2013-05-08 | 丰田自动车株式会社 | Exhaust purification system of internal combustion engine |
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| KR101339523B1 (en) | 2010-03-15 | 2013-12-10 | 도요타지도샤가부시키가이샤 | Exhaust purification system of internal combustion engine |
| BRPI1012615B1 (en) | 2010-03-15 | 2020-08-11 | Toyota Jidosha Kabushiki Kaisha | INTERNAL COMBUSTION ENGINE EXHAUST PURIFICATION SYSTEM |
| BRPI1014237B1 (en) | 2010-04-01 | 2020-06-09 | Toyota Motor Co Ltd | internal combustion engine exhaust gas purification method |
| JP5196024B2 (en) | 2010-07-28 | 2013-05-15 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| ES2599154T3 (en) | 2010-08-30 | 2017-01-31 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for internal combustion engine |
| KR101326348B1 (en) | 2010-08-30 | 2013-11-11 | 도요타지도샤가부시키가이샤 | Exhaust purification system of internal combustion engine |
| US8656706B2 (en) | 2010-09-02 | 2014-02-25 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification system of internal combustion engine |
| WO2012046333A1 (en) | 2010-10-04 | 2012-04-12 | トヨタ自動車株式会社 | Exhaust gas purifying device for internal combustion engine |
| EP2530267B1 (en) | 2010-10-04 | 2016-07-06 | Toyota Jidosha Kabushiki Kaisha | Method for exhaust purification in exhaust purification system of internal combustion engine |
| WO2012053117A1 (en) * | 2010-10-18 | 2012-04-26 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| WO2012053076A1 (en) | 2010-10-20 | 2012-04-26 | トヨタ自動車株式会社 | System for determining catalyst deterioration |
| CN103221648B (en) | 2010-12-06 | 2016-08-24 | 丰田自动车株式会社 | The emission-control equipment of internal combustion engine |
| WO2012086093A1 (en) | 2010-12-20 | 2012-06-28 | トヨタ自動車株式会社 | Exhaust purification device for internal combustion engine |
| EP2495409B1 (en) | 2010-12-24 | 2017-04-19 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification system for internal combustion engine |
| EP2503121B1 (en) | 2011-02-07 | 2017-03-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust-gas purifying system for internal-combustion engine |
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| ES2633727T3 (en) | 2011-11-07 | 2017-09-25 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas cleaning device for internal combustion engine |
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-
2007
- 2007-06-29 CN CN2007800250024A patent/CN101484670B/en not_active Expired - Fee Related
- 2007-06-29 WO PCT/JP2007/063508 patent/WO2008001950A1/en active Application Filing
- 2007-06-29 EP EP07790450A patent/EP2039900B1/en not_active Expired - Fee Related
- 2007-06-29 US US12/227,718 patent/US20090249768A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103097680A (en) * | 2011-08-29 | 2013-05-08 | 丰田自动车株式会社 | Exhaust purification system of internal combustion engine |
| CN103097680B (en) * | 2011-08-29 | 2015-03-11 | 丰田自动车株式会社 | Exhaust purification system of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008001950A1 (en) | 2008-01-03 |
| JP4404073B2 (en) | 2010-01-27 |
| CN101484670B (en) | 2011-09-28 |
| EP2039900A1 (en) | 2009-03-25 |
| EP2039900B1 (en) | 2012-01-25 |
| EP2039900A4 (en) | 2010-11-24 |
| US20090249768A1 (en) | 2009-10-08 |
| JP2008008249A (en) | 2008-01-17 |
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